Needle bearing (transmission) 917/52900 JCB, aftermarket, option 1

For the JCB machines: needle bearing (transmission) 917/52900, an aftermarket part.

A needle bearing is chosen by inside diameter (shaft), outside diameter (gear bore) and width; for example K40x45x27 means a 40 mm shaft, 45 mm bore and 27 mm width. For thrust bearings, the inside and outside diameters and thickness are what matter. As the needles run directly on the shaft and gear surfaces, their hardness and condition matter as much as the bearing itself. In caged needle bearings, a cracked or distorted cage makes the needles run skewed and soon break, so the cage is also inspected carefully on strip-down.

Specifications

Compatibility

According to the product card, 917/52900 is a needle bearing. The card also lists 917/10000, another JCB number for the same part. Fit is confirmed by the part number. The catalogue also has the genuine version and aftermarket version of this part. Other parts are in Transmission.

Fitting

On assembly, wet all rotating parts with clean oil and seat the circlips fully in their grooves. After assembly, measure the end float, fill with the specified oil and watch its temperature in the first hours.